Clarifier short-circuiting, overflow loading and solids loss
Use this when clarifier short-circuiting, overflow loading and solids loss is observed but the cause remains unclear. The diagnostic checks measurement and sampling, operating changes, issue location, and key evidence before suggesting likely causes and the next useful check.
First time here? Start with this
You do not need every data point before you begin
The system asks one discriminating question at a time and updates the candidate causes on the right. Answer from current facts; choose unknown or defer a question when the evidence is not available.
- 1
Confirm the issue
Check whether the symptom is reproducible and whether the measurement or observation is reliable.
- 2
Narrow the causes
Continue through operating changes, issue location, and available inspection results.
- 3
Read the live result
Candidate causes, support, counter-evidence, conflicts, and next actions update as you answer.
This tool analyzes information you already have. It does not insert a safety screen or use safety status to stop the diagnosis. If an alarm, leak, or injury is happening now, follow the site emergency procedure directly.
Automatic troubleshooting · Selections are not uploaded
Only one question is shown at a time. Answer from current facts or defer an unknown item. Possible causes and next checks update on the right as you answer.
- 1Data validity
- 2Operating changes
- 3Issue location
- 4Further confirmation
Question progress
0/32
- Answered
- 0
- To confirm
- 32
- Clues found
- 0
Load a test scenario
Next question
Phase 1 · Data validity
What are the clarifier type and current calculation scope?
The system asks the question most useful for separating possible causes. Unknown or deferred items are not treated as the opposite conclusion.
I have more test or inspection resultsOptionalAdd laboratory analysis, normalized calculations, or checks completed by trained personnel when available. These fields are optional.
View rule sources (15)Standards, regulations, OEM material, and peer-reviewed literature used to audit the diagnostic logic. You do not need to read them before starting.
Each rule cites material directly relevant to its judgment. Current OEM and site procedures remain controlling.
- A-government-regulatory · US EPA · 2025Secondary Treatment Standards
- A-government-guidance · US EPA · 2020Surface Water Treatment Rule Turbidity Guidance Manual
- A-government-operations · US EPA · 1977Process Control Manual for Aerobic Biological Wastewater Treatment Facilities
- A-government-literature-review · US EPA · 1987Critical Literature Review and Research Needed on Activated Sludge Secondary Clarifiers
- A-government-field-manual · US EPA · 1978Field Manual for Performance Evaluation and Troubleshooting at Municipal Wastewater Treatment Facilities
- A-government-design · US EPA · 1975Process Design Manual for Suspended Solids Removal
- A-government-guidance · US EPA · 1999Guidance Manual for Conducting Sanitary Surveys of Public Water Systems: Surface Water and GWUDI
- A-government-technical · US EPA · 2014Water Treatment Pilot Plant Design Manual
- A-multistate-design-standard · Great Lakes–Upper Mississippi River Board / Minnesota Department of Health · 2014Recommended Standards for Wastewater Facilities (Ten States Standards)
- A-state-government-training · Pennsylvania Department of Environmental Protection · 2026Wastewater Treatment Plant Operator Training: Activated Sludge Part 2
- A-government-method · US EPA · 1983Methods for Chemical Analysis of Water and Wastes: Method 160.2
- A-standard · ISO · 2024ISO 5667-3:2024 Water quality — Sampling — Preservation and handling
- A-government-safety · US OSHA · 2026Confined Spaces — Overview
- A-government-safety · US OSHA · 2024Control of Hazardous Energy (Lockout/Tagout)
- A-government-health-evaluation · US CDC/NIOSH · 2025Health Hazard Evaluation Report 2023-0044-3418: Wastewater Treatment